The meaning of v-on in vue

In Vue.js, the v-on instruction is used to listen to DOM events and handle callbacks. The specific implementation is: listen to DOM events (such as click, keyup) and execute the corresponding JavaScript function or method (through v-on :event="handler") supports event modifiers (such as @keyup.enter) and component events (such as @input) to simplify event processing, improve code reusability, and separate business logic and view logic

The meaning of v-on in Vue

In Vue.js, the v-on directive is used to monitor the DOM event and execute the corresponding JavaScript function or method.

Detailed introduction

v-on The syntax of the command is as follows:

<code class="html"><element v-on:event="handler"></code>

Among them:

• event: The DOM event to be monitored, such as click, keyup or submit.
• handler: JavaScript function or method to be executed when the event is triggered.

v-on Directives can trigger event handlers in several ways:

• Via DOM events, such as button clicks or keyboard presses.
• By event modifiers, such as @keyup.enter or @click.prevent.
• Through component events, such as @input or @update:modelValue.

Example

The following is an example of listening to button click events:

<code class="html"><button v-on:click="onClickHandler">点击我</button></code>

When the user clicks the button, onClickHandler method will be called.

Advantages

The main advantages of using the v-on directive include:

• Simplified event handling, eliminating the need to use Inline event listener.
• Improves code reusability and readability.
• Helps separate business logic from view logic.

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